相分离和呼吸图辅助静电纺丝膜表面形貌及水滴回弹和溅射的动态冲击性能。

IF 1.8 4区 化学 Q3 POLYMER SCIENCE Designed Monomers and Polymers Pub Date : 2021-05-25 DOI:10.1080/15685551.2021.1930670
Que Kong, Zhiguang Li, Xuehong Ren, Hao Gu, Wujun Ma
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引用次数: 6

摘要

静电纺丝技术为从各种聚合物中制备连续纳米纤维提供了一种多功能、高效和低成本的方法。本研究采用原子转移自由基聚合法合成了多面体低聚硅氧烷(POSS)嵌段共聚物。以POSS嵌段共聚物、聚偏氟乙烯(PVDF)和氧化铝(Al2O3)为原料,采用静电纺丝法制备了光滑纤维、多孔纤维或分层多孔微球。考察了共聚物浓度、溶剂配比、Al2O3粒径和浓度对表面形貌的影响。采用相分离法和呼吸图法,通过调节溶剂的比例制备了多孔纤维和多孔微球。报道了等体积水滴对静电纺丝膜的动力学行为。研究了水滴的形态演变、恢复系数和能量变化。液滴在超疏水表面多次反弹,而当接触角小于150°时,液滴保持固定不反弹。另一方面,水滴溅落在氧化铝基静电纺丝膜上。最后,对静电纺丝膜的力学性能进行了研究。
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The surface morphology and dynamic impact properties with rebounding and splashing of water droplet on phase separation and breath figure assisted electrospinning films.

Electrospinning provides a versatile, efficient and low-cost method for the preparation of continuous nanofibres from various polymers. In this study, the polyhedral oligomeric silsesquioxanes (POSS) block copolymer was synthesized via atom transfer radical polymerization. The smooth fiber, porous fiber or hierarchically porous microspheres were prepared by electrospinning from POSS block copolymer, poly(vinylidene fluoride) (PVDF) and aluminium oxide (Al2O3). The influence of copolymer concentration, the ratio of the solvents, the diameter and concentration of the Al2O3 on the surface morphology were investigated. Porous fibers and porous microspheres were prepared by regulating the ratio of the solvents from the phase separation and breath figure methods. The dynamic behavior of the water droplet with the constant volume impacting on the electrospinning films were reported. The morphology evolution, restitution coefficient, the change of energy of the water droplets are examined. The droplet bounces several times on the superhydrophobic surface, while the droplet remains pinned and does not rebound when the contact angles was lower than 150°. On the other hand, the water droplets were splashed on the Al2O3 based electrospinning films. Finally, the mechanical properties of the electrospinning films were investigated.

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来源期刊
Designed Monomers and Polymers
Designed Monomers and Polymers 化学-高分子科学
CiteScore
3.30
自引率
0.00%
发文量
28
审稿时长
2.1 months
期刊介绍: Designed Monomers and Polymers ( DMP) publishes prompt peer-reviewed papers and short topical reviews on all areas of macromolecular design and applications. Emphasis is placed on the preparations of new monomers, including characterization and applications. Experiments should be presented in sufficient detail (including specific observations, precautionary notes, use of new materials, techniques, and their possible problems) that they could be reproduced by any researcher wishing to repeat the work. The journal also includes macromolecular design of polymeric materials (such as polymeric biomaterials, biomedical polymers, etc.) with medical applications. DMP provides an interface between organic and polymer chemistries and aims to bridge the gap between monomer synthesis and the design of new polymers. Submssions are invited in the areas including, but not limited to: -macromolecular science, initiators, macroinitiators for macromolecular design -kinetics, mechanism and modelling aspects of polymerization -new methods of synthesis of known monomers -new monomers (must show evidence for polymerization, e.g. polycondensation, sequential combination, oxidative coupling, radiation, plasma polymerization) -functional prepolymers of various architectures such as hyperbranched polymers, telechelic polymers, macromonomers, or dendrimers -new polymeric materials with biomedical applications
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